Teachers in pre-elementary schools do have this training. They already welcome very young children in their classroom. In France, children go to school for the first time during the year in which they turn 3 years old. So some begin a bit younger, at 2 1/2 years old. On top of that, the teachers are not alone in the classroom to take care of the kids, and specialists of the young-aged children are also employed by schools to be present for the youngest.